Localized surface plasmon resonance phenomenon in Ag/Au-WO3-x nanocomposite thin films

Prikhodko, O. Yu.; Dosseke, Ulantai; Nemkayeva, Renata; Rofman, O.V.; Guseinov, Nazim; Mukhametkarimov, Yerzhan

doi:10.1016/j.tsf.2022.139387

Cited by 4 publications

(1 citation statement)

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“…In the second case, we investigated the behavior of similar thin film composite systems containing silver (Ag) and gold-silver (Ag/Au) alloy nanoparticles. Such composite thin films were described in our previous works [32,33]. The Raman spectra of composite thin films with Ag NPs (see Figure S7 of SI) demonstrate a defect peak regardless of the wavelength of the excitation laser (473 nm, 633 nm) due to the high value of interband transition energy (4 eV) of Ag NPs and enhanced near-field in the entire considered spectral range.…”

Section: Discussionmentioning

confidence: 56%

Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites

Sagidolda,

Yergaliyeva,

Tolepov

et al. 2023

Materials

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As nanotechnology continues to advance, the study of nanocomposites and their unique properties is at the forefront of research. There are still various blank spots in understanding the behavior of such composite materials, especially regarding plasmonic effects like localized surface plasmon resonance (LSPR) which is essential for developing advanced nanotechnologies. In this work, we explore the structural properties of composite thin films consisting of oxide matrices and gold nanoparticles (Au NPs), which were prepared by radio-frequency magnetron sputtering. Titanium dioxide (TiO2) and tungsten trioxide (WO3) were chosen as the host matrices of the composites. Such composite thin films owing to the presence of Au NPs demonstrate the LSPR phenomenon in the visible region. It is shown, that spectroscopic study, in particular, Raman spectroscopy can reveal peculiar features of structures of such composite systems due to LSPR and photoluminescence (PL) of Au NPs in the visible spectrum. In particular, defect peaks of TiO2 (700–720 cm−1) or WO3 (935 cm−1) in Raman spectra can be clearly observed when the samples are illuminated with a 633 nm excitation laser. Excitation with 532 nm leads to a decrease in the intensity of the defect peak, which totally disappears at 473 nm excitation. Such dependences of the defect peaks on excitation laser wavelength are probably related to the polarization of the matrix’s defective regions close to the interface with gold NPs.

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Section: Discussionmentioning

confidence: 56%

Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites

Sagidolda,

Yergaliyeva,

Tolepov

et al. 2023

Materials

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Photoactivity Enhancement of WO₃ Photoanodes Using the Combined Effect of Plasmonic Au and Photoluminescent Y₂O₃:Eu³⁺ Nanoparticles

Abduvalov,

Zhumanova,

Kaikanov

et al. 2024

ACS Omega

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The WO 3 photoanode has great potential application for solar photoelectrochemical water oxidation due to suitable band edge positions with water oxidation potentials. However, it suffers from poor light absorbance in the visible region. Here, we use Eu 3+ -doped Y 2 O 3 nanoparticles (NPs) in combination with plasmonic gold (Au) NPs to better utilize and adsorb photons from UV and visible regions of sunlight. We attached plasmonic Au NPs on WO 3 to enhance the photocatalytic properties due to the plasmon resonance mechanism. Additional deposition of Y 2 O 3 :Eu 3+ NPs on Au NPs/WO 3 improved the photoactivity of the photoanode further. Y 2 O 3 :Eu 3+ NPs' downconversion property, along with their light-scattering effect, converts ultraviolet-region photons into visible-region photons and enforces the plasmon resonance mechanism of Au NPs. Experimental results show the increase of absorbance, improvement of electron−hole separation, and enhancement in photocurrent generation of the resultant photoelectrode.

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PLASMON RESONANCE IN THIN ZnO FILMS WITH NANOPARTICLES OF NOBLE METALS

Koshanova,

Nemkayeva,

Guseinov

et al. 2024

jour

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The main disadvantage of traditional metal oxides, including zinc oxide (ZnO), is poor absorption of light in the visible range. Among the many ways to solve this problem, the creation of their composition with noble metal nanoparticles (NPs) is the most interesting from both practical and theoretical points of view. Due to the effect of localized surface plasmon resonance (LSPR), characterized by a light absorption band in the visible range, the functionality of oxide semiconductors can be significantly improved. This work presents the results of preparation of composite films based on ZnO with nanoparticles of noble metals (silver Ag, gold Au and their alloy AgAu) by magnetron sputtering, as well as the analysis of the LSPR effect in these composites. In ZnO:AgNPs films, the LSPR absorption was observed at 475 nm, while for ZnO:AuNPs at 535 nm. The AuAg alloy nanoparticles exhibit a maximum in the intermediate interval of these two values, i.e., in the region of 508 nm. The obtained data indicate that by controlling the composition of noble metal nanoparticles it is possible to effectively control the light absorption band in the visible range.

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Localized surface plasmon resonance phenomenon in Ag/Au-WO3-x nanocomposite thin films

Cited by 4 publications

References 47 publications

Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites

Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites

Photoactivity Enhancement of WO₃ Photoanodes Using the Combined Effect of Plasmonic Au and Photoluminescent Y₂O₃:Eu³⁺ Nanoparticles

PLASMON RESONANCE IN THIN ZnO FILMS WITH NANOPARTICLES OF NOBLE METALS

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Localized surface plasmon resonance phenomenon in Ag/Au-WO3-x nanocomposite thin films

Cited by 4 publications

References 47 publications

Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites

Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites

Photoactivity Enhancement of WO3 Photoanodes Using the Combined Effect of Plasmonic Au and Photoluminescent Y2O3:Eu3+ Nanoparticles

PLASMON RESONANCE IN THIN ZnO FILMS WITH NANOPARTICLES OF NOBLE METALS

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Photoactivity Enhancement of WO₃ Photoanodes Using the Combined Effect of Plasmonic Au and Photoluminescent Y₂O₃:Eu³⁺ Nanoparticles